Overlays and GL/Vulkan extensions aren't strictly necessary, though support ultimately depends on the driver. For example, glamor does the conversion for some f

Overlays and GL/Vulkan extensions aren't strictly necessary, though support ultimately depends on the driver. For example, glamor does the conversion for some formats in a shader: https://gitlab.freedesktop.org/xorg/xserver/-/blob/8274dd664335cd72739a1107f174e7a974a9ea24/glamor/glamor_xv.c#L314 https://gitlab.freedesktop.org/xorg/xserver/-/blob/8274dd664...